Thermophobicity of liquids: Heats of transport in mixtures as pure component properties-The case of arbitrary concentration

被引：28

作者：

Hartmann, S. ^{[1
]}

Wittko, G. ^{[1
]}

Schock, F. ^{[1
]}

Gross, W. ^{[1
]}

Lindner, F. ^{[1
]}

Koehler, W. ^{[1
]}

Morozov, K. I. ^{[2
]}

机构：

[1] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany

[2] Technion Israel Inst Technol, Dept Chem Engn, IL-32000 Haifa, Israel

来源：

JOURNAL OF CHEMICAL PHYSICS | 2014年 / 141卷 / 13期

关键词：

THERMAL-DIFFUSION COEFFICIENTS; FORCED RAYLEIGH-SCATTERING; EXCESS MOLAR VOLUMES; BINARY-MIXTURES; THERMODYNAMIC PROPERTIES; AROMATIC-HYDROCARBONS; CHARGED COLLOIDS; PLUS CYCLOHEXANE; N-HEPTANE; SORET;

D O I：

10.1063/1.4896776

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have measured Soret coefficients of a large number of binary mixtures of 23 different organic solvents. The present analysis is based on 77 equimolar mixtures and strongly supports the thermophobicity concept previously developed for the heats of transport of originally 10 different substances [S. Hartmann, G. Wittko, W. Kohler, K. I. Morozov, K. Albers, and G. Sadowski, Phys. Rev. Lett. 109, 065901 (2012)]. Among the investigated compounds, cis-decalin is the most thermophobic, hexane the most thermophilic one. In addition to the equimolar mixtures, we have also analyzed the composition dependence of the Soret coefficients and the heats of transport for 22 selected binary mixtures. Both the interpretation of the heats of transport in equimolar mixtures as pure component thermophobicities and the composition dependence of the Soret coefficient can be understood on the basis of the thermodiffusion theory developed by Morozov [Phys. Rev. E 79, 031204 (2009)], according to which the composition dependence is determined by the excess volume of mixing. (C) 2014 AIP Publishing LLC.

引用

页数：8

共 48 条

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